4220445 has 8 divisors (see below), whose sum is σ = 6752736. Its totient is φ = 2250896.

The previous prime is 4220441. The next prime is 4220449. The reversal of 4220445 is 5440224.

It is an interprime number because it is at equal distance from previous prime (4220441) and next prime (4220449).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4220445 - 2² = 4220441 is a prime.

4220445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140667 + ... + 140696.

It is an arithmetic number, because the mean of its divisors is an integer number (844092).

Almost surely, 2^4220445 is an apocalyptic number.

It is an amenable number.

4220445 is a deficient number, since it is larger than the sum of its proper divisors (2532291).

4220445 is a wasteful number, since it uses less digits than its factorization.

4220445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281371.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 4220445 is about 2054.3721668675. The cubic root of 4220445 is about 161.6042389544.

Adding to 4220445 its reverse (5440224), we get a palindrome (9660669).

The spelling of 4220445 in words is "four million, two hundred twenty thousand, four hundred forty-five".